In night clubs in Germany and on music festivals we had this planes of laser light that were moving through the crowds and some of them were vertical and therfore also hit the eyes for a short moment. However if the time is very short, that should have the same effect like a low energy. For example the stove can be hundreds of degrees hot, but if you only touch it for a 1/100 of a second, you might not burn your skin. I think for that reason lidar scanners are pulsed.
In my university we had a laser that produced a pulse of 100,000,000,000,000 watts (14 zeros!), but only for 1/1,000,000,000,000 seconds. So it only used the same energy as a 100 Watt laser for one second. Of course 100 Watts is still a lot for a laser, but that example shows that short pulses can reduce the overall energy by a lot and still achieve a goal.
In my university we had a laser that produced a pulse of 100,000,000,000,000 watts (14 zeros!), but only for 1/1,000,000,000,000 seconds. So it only used the same energy as a 100 Watt laser for one second. Of course 100 Watts is still a lot for a laser, but that example shows that short pulses can reduce the overall energy by a lot and still achieve a goal.
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